ASSEMBLING MACHINE AND METHOD
An assembling machine for assembling an elongated module into a tubular body includes a holding assembly disposed on a base for holding the tubular body, a conveying assembly slidably connected to the base and having a cantilever for holding the elongated module and adapted to extend into the tubular body through a first opening thereof with the elongated module partially protruding from a second opening thereof, and a dispenser positioned between the cantilever and the holding assembly for dispensing adhesive on a joint surface of the elongated module. The holding assembly is adapted to drive the tubular body to move to a pressed position, so that an inner surface of the tubular body is pressed against the joint surface of the elongated module.
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This application claims priority of Chinese Application No. 201210338444.7, filed on Sep. 13, 2012, the disclosure of which is hereby incorporated by reference in its entirety.
BACKGROUND OF THE INVENTION1. Field of the Invention
The invention relates to an assembling machine and an assembling method, more particularly to an assembling machine for assembling an elongated module into a tubular body and an associated method therefor.
2. Description of the Related Art
A current LED tube typically includes a heat dissipation substrate, a plurality of LEDs mounted thereon, and a tubular glass body. A method for assembling the heat dissipation substrate into the tubular glass body includes manually dispensing an adhesive upon one side of the heat dissipation substrate firstly, and then inserting the heat dissipation substrate into the tubular glass body so that the side of the heat dissipation substrate with the adhesive adheres to an inner surface of the tubular glass body. When the adhesive sets, the heat dissipation substrate is securely fastened to the tubular glass body.
Because the current assembling method for the heat dissipation substrate and the tubular glass body requires manual labor, the method is inefficient and the speed of assembly is relatively slow, thereby increasing the production cost. Further, manually dispensing the adhesive on the heat dissipation substrate may result in a nonuniform coating of adhesive on the heat dissipation substrate, so that the heat dissipation substrate cannot be securely adhered to the tubular glass body. Additionally, manually inserting the heat dissipation substrate into the tubular glass body may scratch a diffusion layer coated on the inner surface of the tubular glass body, thereby damaging the tubular glass body such that it must be discarded. Thus, the defective rate during production is increased.
SUMMARY OF THE INVENTIONTherefore, an object of the present invention is to provide an assembling machine and method that can automatically and securely assemble an elongated module into a tubular body, so that speed of assembly and efficiency thereof can be enhanced, thereby increasing the assembly yield and reducing the production costs associated therewith.
The advantages and effects of the assembling machine and method of the present invention reside in that by using the design of the holding device, the supporting device, the conveying device, the dispensing device, and the control device to automatically assemble the elongated module inside the tubular body, speed of assembly and efficiency thereof can be enhanced, thereby reducing the production costs associated therewith. Further, the elongated module is prevented from scratching the inner surface of the tubular body during assembly, so that discarding of the tubular body due to damage can be reduced, thereby enhancing the production yield. Additionally, by using the dispensing device to replace manual dispensing of the adhesive, the adhesive can be coated uniformly on the joint surface of the elongated module, thereby preventing nonuniform coating of the adhesive.
Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which:
The above-mentioned and other technical contents, features, and effects of this invention will be clearly presented from the following detailed description of two preferred embodiments in coordination with the reference drawings. Through description of the concrete implementation method, the technical means employed and the effectiveness to achieve the predetermined purposes of the present invention will be thoroughly and concretely understood. However, the enclosed drawings are used for reference and description only, and are not used for limiting the present invention.
Before this invention is described in detail, it should be noted that, in the following description, similar elements are designated by the same reference numerals.
Referring to
Referring to
The base 2 further includes an elongated slide rail 25 disposed on a top surface of the protruding seat 22 and extending in the front-rear direction (I). The conveying device 5 includes a conveying assembly 50 that is proximate to the front end 23 and that is slidably connected to the slide rail 25. Through the slidable connection of the conveying assembly 50 with the slide rail 25, the conveying assembly 50 is slidable in the front-rear direction (I) relative to the base 2. The conveying assembly 50 includes a cantilever 51 that is disposed above and spaced apart from the slide rail 25 for holding the heat dissipation substrate 11 such that dissipation substrate 11 faces the cantilever 51. The cantilever 51 is movable between a default position (see
Referring to
Furthermore, in order to stably position the tubular body 12 in the positioning groove 310 and to simultaneously drive movement of the tubular body 12 between the default height position and the pressed position, each holding assembly 30 further includes a press plate 32 that is connected to and slidable relative to the positioning plate 31 in a left-right direction (III) (see
With reference to
Additionally, each holding assembly 30 further includes a fixed post 34 and a first pneumatic cylinder 35. The fixed post 34 is affixed to one side of the protruding seat 22, for example, by a screw-fastening method. The positioning plate 31 includes a first plate portion 311, and a second plate portion 312 perpendicularly connected to the first plate portion 311. The first plate portion 311 is formed with the positioning groove 310, and is connected to the press plate body 321 through the fasteners 33. The first plate portion 311 is slidably connected to a slide rail 341 of the fixed post 34. The slide rail 341 is elongated, and extends in the up-down direction (II), as shown in
As shown in
Referring to
As shown in
The supporting arm 41 includes a guide inclined face 411 (see
It is worth mentioning that because the cantilever 51 is in a suspended state, if the heat dissipation substrate 11 depends solely on the cantilever 51 for support, when the holding assemblies 30 are driven to move the tubular body 12 downward to the pressed position, rear portions of the cantilever 51 and the heat dissipation substrate 11 are likely to bend slightly downward due to downward force of the tubular body 12, so that the inner surface 123 of the tubular body 12 cannot intimately adhere to the joint surface 112 of the heat dissipation substrate 11. Therefore, the present embodiment uses the cantilever 51, the supporting arm 41, and the stop plate 42 to cooperatively support the heat dissipation substrate 11 to ensure that the inner surface 123 of the tubular body 12 can intimately adhere to the joint surface 112 of the heat dissipation substrate 11 when the tubular body 12 is moved downward to the pressed position.
As shown in
A middle one of the light emitting units 131 includes two pairs of electrical connectors 135 protruding from the circuit board 132 thereof. Each pair of the electrical connectors 135 are spaced apart from each other in the left-right direction (III) and are proximate to a corresponding short side 134 of the circuit board 132. Each of a front and a rear ones of the light emitting units 131 includes a pair of electrical connectors 135 protruding from the corresponding circuit board 132. The pairs of the electrical connectors 135 of the front and rear light emitting units 131 correspond in position with the pairs of the electrical connectors 135 of the middle light emitting unit 131. Each pair of the electrical connectors 135 of the middle light emitting unit 131 are electrically and respectively connected to the pair of the electrical connectors 135 of the corresponding front or rear light emitting unit 131 by a pair of bonding wires 136, thereby electrically connecting the circuit boards 132 of the front and rear light emitting units 131.
As shown in
It should be noted that the number of the light emitting units 131 and the configurations of the LEDs 133, the electrical connectors 135, and the bonding wires 136 may be modified as necessary and should not be limited to the above disclosed embodiment. Because the cantilever 51 can be detachably connected between the lower plate 521 and the upper plate 522, the cantilever 51 may be replaced to correspond to the modified number of the light emitting units 13 and the modified configurations of the LEDs 133, the electrical connectors 135, and the bonding wires 136, so that the first and second receiving grooves 512, 513 of the cantilever 51 can coordinate with the LEDs 133, the electrical connectors 135, and the bonding wires 136 of the light emitting module 13, thereby ensuring intimate abutment of the circuit board 132 of each light emitting unit 131 with the holding surface 511 of the cantilever 51. Further, in this embodiment, the elongated module 100 may only include the heat dissipation substrate 11 and without having the light emitting module 13. In this case, the cantilever 51 may omit the first and second receiving grooves 512, 513, so that the plate surface 111 of the heat dissipation substrate 11 is in direct contact with the holding surface 511 of the cantilever 51.
As shown in
The assembling machine 200 further includes a control device 7 disposed on the base 2. The control device 7 includes a control box 71 disposed on the base plate 21, and a control unit 72 disposed on the control box 71.
The dispensing device 6 further includes a holding frame 62 fixed to a front side of the control box 71, and a dispensing control unit 63 disposed atop the control box 71. The dispenser 61 is disposed on and held by the holding frame 62, has a needle-like structure, and contains adhesive 60 (see
The control device 7 further includes a first sensor 73 disposed on the base plate 21 and electrically coupled to the control unit 72. The conveying assembly 50 further includes a plate 54 disposed on the side plate 527 of the slide member 52. When the plate 54 and the first sensor 73 correspond in position, the first sensor 73 generates and sends a signal to the control unit 72, which then controls the dispenser 61 to start dispensing the adhesive 60. It should be noted that the plate 54 may be, for example, a sensor board having a chip or a circuit. The control device 7 further includes a second sensor 74 disposed on the base plate 21 and electrically coupled to the control unit 72. The second sensor 74 is spaced apart from and is disposed rearwardly of the first sensor 73. When the plate 54 and the second sensor 79 correspond in position, the second sensor 74 generates and sends a signal to the control unit 72, which then controls the dispensing unit 61 to stop dispensing the adhesive 60. Through the arrangement of the first and second sensors 73, 79, the dispenser 61 can dispense the adhesive 60 onto the joint surface 112 of the heat dissipation substrate 11 within a predetermined length (i.e., the distance between the first and second sensors 73, 74).
The motor 531 of the drive mechanism 53 is electrically coupled to the control unit 72. The control device 7 further includes a rear limit switch 75 disposed on the base plate 21 and electrically coupled to the control unit 72. The rear limit switch 75 is spaced apart from and is disposed rearwardly of the second sensor 74. When the plate 54 and the rear limit switch 75 correspond in position, the rear limit switch 75 generates and sends a signal to the control unit 72, which then controls the motor 531 to stop actuation so as to position the cantilever 51 at the extended position and to control the holding assemblies 30 to move downwardly the tubular body 12 to the pressed position.
The control device 7 further includes a timer 76 disposed within the control box 71 and electrically connected to the control unit 72. The timer 76 is used to measure a length of time that the holding assemblies 30 and the tubular body 12 are in the pressed position. When the length of time reaches a preset value that is preset by the timer 76, the timer 76 generates and sends a signal to the control unit 72, so that the control unit 72 controls the holding assemblies 30 to move upwardly to place the tubular body 12 back to the default height position. This can ensure that after the adhesive 60 between the joint surface 112 of the heat dissipation substrate 11 and the tubular body 12 is set, only then will the control unit 72 command the holding assemblies 30 to move the tubular body 12 back to the default height position, thereby preventing the tubular body 12 from separating from the heat dissipation substrate 11 due to unsolidified adhesive.
The control unit 72 controls actuation of the motor 531 so as to drive sliding movement of the conveying assembly 50 to thereby move the cantilever 51 back to the default position. The control device further includes a front limit switch 77 disposed on the base plate 21 at a position spaced apart from and forwardly of the first sensor 73 and electrically coupled to the control unit 72. When the plate 54 and the front limit switch 77 correspond in position, the front limit switch 77 generates and sends a signal to the control unit 72, which then controls the motor 53 to stop actuation to thereby position the conveying assembly 50 at the default position.
Below is a detailed description of an assembling method of the assembling machine, as shown in
In step 91, the conveying assembly 50 of the conveying device 5 that holds the elongated module 100 is slid rearwardly along the front-rear direction (I), so that the elongated module 100 faces the first opening 121 of the tubular body 12 which is positioned on the holding device 3.
In step 92, the dispensing device 6 is actuated to dispense adhesive 60 onto the joint surface 112 of the elongated module 100 as the elongated module 100 is moved rearwardly. The cantilever 51 of the conveying assembly 50 drives the adhesive-coated elongated module 100 into the tubular body 12 through the first opening 121.
In step 93, the dispensing device 6 is stopped from dispensing the adhesive 60 onto the joint surface 112 of the elongated module 100.
In step 94, movement of the conveying assembly 50 is stopped so that a portion of the elongated module 100 protrudes from the second opening 122.
In step 95, the holding device 3 is actuated to move downwardly so as to place the tubular body 12 in the pressed position, in which the inner surface 123 of the tubular body 12 is pressed against and adhered to the joint surface 112 of the elongated module 100.
In step 96, the holding device 3 is actuated to move upwardly so as to place the tubular body 12 with the adhered elongated module 100 in the default height position to thereby separate the elongated module 100 from the cantilever 51.
Finally, in step 97, the conveying assembly 50 is actuated to slide forwardly until the cantilever 51 is located at the default position, in which the cantilever 51 is spaced apart from and is disposed in front of the first opening 121.
With reference to
Referring to
When the conveying assembly 50 drives the plate 54 to move to a position corresponding to that of the first sensor 73, the first sensor 73 generates and sends a signal to the control unit 72. The control unit 72 then actuates the dispensing device 6 to carry out step 92. As shown in
Referring to
Referring to
Referring to
Referring to
Subsequently, with reference to
As shown in
The conveying device 5 includes two conveying assemblies 50 that are slidably connected to the respective slide rails 25. The lower plates 521 of the conveying assemblies 50 are connected to each other through the side plate 527. Through this configuration, the drive mechanism 53 can simultaneously drive sliding movement of the two conveying assemblies 50. The cantilever 51′ of each conveying assembly 50 includes a holding portion 514 for holding the heat dissipation substrate 11 and the light emitting module 13. The holding portion 514 has a holding surface 511 for holding the light emitting module 13. Each conveying assembly 50 further includes two positioning members 55 disposed on the holding portion 514 of the cantilever 51′ and spaced apart in the left-right direction (III). Each positioning member 55 is peg-shaped and is used for abutment of the front end 113 of the heat dissipation substrate 11 thereto so as to position the heat dissipation substrate 11 and the light emitting module 13 on the holding portion 514.
With reference to
As shown in
As shown in
To sum up, each embodiment of the assembling machine 200, 210 uses the design of the holding device 3, the supporting device 4, the conveying device 5, the dispensing device 6, and the control device 7 automatically assemble the elongated module 100 inside the tubular body 12, thereby increasing the speed of assembly, enhancing the efficiency thereof and reducing the production costs associated therewith. Further, the heat dissipation substrate 11 of the elongated module 100 will not scratch the inner surface 123 of the tubular body 12 during assembly thereof, so that discarding of the tubular body 12 due to damage can be reduced, thereby enhancing the production yield. Additionally, by using the dispensing device 6 to replace manual dispensing of the adhesive, the adhesive can be coated uniformly on the joint surface 112 of the heat dissipation substrate 11, thereby preventing nonuniform coating of the adhesive. Therefore, the objects of the present invention can be achieved.
While the present invention has been described in connection with what are considered the most practical and preferred embodiments, it is understood that this invention is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Claims
1. An assembling machine for assembling an elongated module into a tubular body, the elongated module including a plate surface and a joint surface opposite to the plate surface, the tubular body having opposite first and second openings, said assembling machine comprising:
- a base extending in a front-rear direction and having a front end and a rear end;
- a holding device including at least one holding assembly disposed on said base between said front and rear ends thereof for holding the tubular body such that an axis of the tubular body is parallel to the front-rear direction and the first and second openings respectively face said front and rear ends of said base;
- a conveying device including a conveying assembly connected to said base in proximity to said front end thereof and slidable in the front-rear direction relative to said base, said conveying assembly including a cantilever disposed above and spaced apart from said base for holding the elongated module, the plate surface of the elongated module faces said cantilever, said cantilever being movable between a default position, in which said cantilever is adapted to be positioned in front of the first opening, and an extended position, in which said cantilever is adapted to extend into the tubular body through the first opening such that a portion of the elongated module protrudes from the second opening; and
- a dispensing device including a dispenser disposed above and spaced apart from said base and positioned between said cantilever and said holding assembly for dispensing adhesive on the joint surface of the elongated module;
- wherein said holding assembly is adapted to move the tubular body in an up-down direction and between a default height position, in which the tubular body surrounds the elongated module and an inner surface of the tubular body is spaced apart from the joint surface of the elongated module, and a pressed position, in which the inner surface of the tubular body is pressed against the joint surface of the elongated module, the pressed position being lower than the default height position.
2. The assembling machine as claimed in claim 1, further comprising a control device disposed on said base, said control device including a first sensor, a second sensor spaced apart from and disposed rearwardly of said first sensor, and a control unit electrically coupled to said first and second sensors and said dispensing device, said conveying assembly further including a slide member connected to said cantilever and slidably connected to said base, and a plate disposed on said slide member, wherein when said plate and said first sensor correspond in position, said first sensor generates and transmits a signal to said control unit to control said dispenser to start dispensing the adhesive, and when said plate and said second sensor correspond in position, said second sensor generates and transmits a signal to said control unit to control said dispenser to stop dispensing the adhesive.
3. The assembling device as claimed in claim 2, wherein said conveying device further includes a drive mechanism disposed on said base to drive sliding movement of said slide member and electrically coupled to said control unit, said control device further including a rear limit switch spaced apart from and disposed rearwardly of said second sensor and electrically coupled to said control unit, when said plate and said rear limit switch correspond in position, said rear limit switch generates and transmits a signal to said control unit to control said drive mechanism to stop actuation so as to position said cantilever in said extended position and to control said holding assembly to move downwardly the tubular body to the pressed position.
4. The assembling machine as claimed in claim 3, wherein said drive mechanism is actuated by said control unit to drive sliding movement of said conveying assembly to thereby move said cantilever back to said default position, said control device further including a front limit switch disposed on said base at a position spaced apart from and forwardly of said first sensor, when said plate and said front limit switch correspond in position, said front limit switch generates and transmits a signal to said control unit to control said drive mechanism to stop actuation.
5. The assembling machine as claimed in claim 1, wherein said holding device includes two said holding assemblies spaced apart from each other in the front-rear direction, each of said holding assemblies including a positioning plate and a press plate slidably connected to said positioning plate, said positioning plate defining a positioning groove for accommodating the tubular body, said positioning groove having a V-shaped cross section, said press plate being slidable in a left-right direction relative to said positioning plate between an original position, in which said press plate is adapted to be spaced apart from an outer surface of the tubular body, and a pressing position, in which said press plate is adapted to press against a top end of the outer surface of the tubular body.
6. The assembling machine as claimed in claim 5, wherein each of said holding assemblies further includes a first pneumatic cylinder connected to said positioning plate to drive movement of said positioning plate and said press plate in the up-down direction for moving the tubular body between the default height position and the pressed position.
7. The assembling machine as claimed in claim 5, wherein said press plate includes a press plate body, and a press member disposed on said press plate body, said press plate body defining an elongated guide slot that extends in the left-right direction, each of said holding assemblies further including a fastener inserted into said elongated guide slot and fixed to said positioning plate, said press member being made of a plastic material and being used for pressing against the top end of the outer surface of the tubular body.
8. The assembling machine as claimed in claim 1, further comprising a supporting device disposed on said base in proximity to said rear end thereof, said supporting device including a supporting arm that is spaced apart from and positioned above said base, that is adapted to extend into the tubular body through the second opening, and that is adapted to abut against the portion of the elongated module that protrudes from the second opening when said cantilever is at said extended position.
9. The assembling machine as claimed in claim 8, wherein said cantilever is elongated, extends in the front-rear direction, and has a rear end, the elongated, module extends in the front-rear direction and has a rear end that protrudes beyond said rear end of said cantilever, said supporting arm including a guide inclined face that inclines frontwardly and downwardly for abutment thereagainst of the rear end of the elongated module.
10. The assembling machine as claimed in claim 9, where said supporting device further includes a stop plate disposed on said base and having a front stop surface for stopping an open end of the tubular body that is proximate to the second opening, and a top surface for supporting the elongated module, said supporting arm protruding frontwardly from said front stop surface and flushing with said top surface of said stop plate.
11. The assembling machine as claimed in claim 9, wherein said supporting device further includes a frame disposed on said base, a stop plate disposed on said frame for stopping an open end of the tubular body that is proximate to the second opening, and a second pneumatic cylinder disposed on said frame to drive movement of said supporting arm in the front-rear direction and between a retracted position, in which said supporting arm is positioned behind said stop plate, and a protruding position, in which said supporting arm extends frontwardly beyond said stop plate.
12. The assembling machine as claimed in claim 1, wherein said conveying assembly further includes a slide member connected to said cantilever and slidably connected to said base, said slide member defining a positioning groove for receiving a front end of the elongated module.
13. The assembling machine as claimed in claim 1, wherein said conveying assembly further includes two positioning members disposed on said cantilever and spaced apart in a left-right direction, each of said positioning members being peg-shaped for abutment thereagainst of a front end of the elongated module.
14. The assembling machine as claimed in claim 1, the elongated module has a front end, wherein said conveying assembly further includes a positioning member movably sleeved on said cantilever for abutment thereagainst of the front end of the elongated module, and two screws respectively screwed to left and right sides of said positioning member, each of said screws being used to abut against said cantilever to fix said positioning member to said cantilever.
15. The assembling machine as claimed in claim 1, wherein said cantilever includes a holding portion for holding the elongated module, said assembling machine further comprising a supporting frame disposed on said base in proximity to said dispenser, said supporting frame including two supporting rollers spaced apart in the left-right direction and abutting against a bottom surface of said holding portion, said cantilever including a protruding plate protruding downwardly from said bottom surface of said holding portion between said two supporting rollers, and a contact roller pivoted to and protruding from a bottom end of said protruding plate, said protruding plate defining an inclined end face that inclines upwardly and rearwardly and that is connected to said holding portion, said contact roller being proximate to a bottom end of said inclined end face and being adapted to abut against the inner surface of the tubular body.
16. An assembling method for assembling an elongated module into tubular body, said tubular body having opposite first and second openings, said assembling method comprising:
- (A) sliding a conveying assembly of a conveying device rearwardly so that the elongated module held by the conveying assembly is moved rearwardly toward the tubular body in proximity to the first opening, wherein the tubular body is positioned on a holding device;
- (B) actuating a dispensing device to dispense adhesive on a joint surface of the elongated module as the elongated module is moved rearwardly, wherein a cantilever of the conveying assembly drives the adhesive-coated elongated module into the tubular body through the first opening;
- (C) stopping the dispensing device from dispensing the adhesive on the joint surface of the elongated module;
- (D) stopping movement of the conveying assembly so that a portion of the elongated module protrudes from the second opening;
- (E) actuating the holding device to move downwardly so as to place the tubular body in a pressed position, in which an inner surface of the tubular body is pressed against and adhered to the joint surface of the elongated module; and
- (F) actuating the holding device to move upwardly so as to place the tubular body with the adhered elongated module in a default height position to thereby separate the elongated module from the cantilever.
17. The assembling method as claimed in claim 16, wherein in step (C), the portion of the elongated module that protrudes from the second opening abuts against a supporting device that extends into the tubular body through the second opening.
18. The assembling method as claimed in claim 17, wherein in step (B), when a plate of the conveying assembly and a first sensor of a control device correspond in position, the first sensor transmits a signal to a control unit which is electrically coupled to the dispensing device, so that the control unit controls the dispensing device to start dispensing the adhesive; and in step (C), when the plate of the conveying assembly and a second sensor of the control device correspond in position, the second sensor transmits a signal to the control unit, so that the control unit controls the dispensing device to stop dispensing the adhesive.
19. The assembling method as claimed in claim 18, wherein in step (D), when the plate of the conveying assembly and a rear limit switch of the control device correspond in position, the rear limit switch transmits a signal to the control unit, so that the control unit controls stop movement of the conveying assembly and subsequently controls the holding device to move downwardly to thereby place the tubular body in the pressed position; in step (E), a timer of the control device is used to measure a length of time that the tubular body remains at the pressed position; and in step (F), when the timer reaches a preset value, the timer transmits a signal to the control unit, so that the control unit controls the holding device to move upwardly to place the tubular body at the default height position.
20. The assembling method as claimed in claim 19, further comprising the step of:
- (G) sliding the conveying assembly forwardly until the cantilever is at a default position, in which the cantilever is spaced apart from and is disposed frontwardly of the first opening of the tubular body, wherein when the plate of the conveying assembly and a front limit switch of the control device correspond in position, the front limit switch transmits a signal to the control unit, so that the control unit controls stop movement of the conveying assembly to thereby position the cantilever at the default position.
Type: Application
Filed: Sep 10, 2013
Publication Date: Mar 13, 2014
Patent Grant number: 9138972
Applicants: LITE-ON TECHNOLOGY CORP. (Taipei), LITE-ON ELECTRONICS (GUANGZHOU) LIMITED (Guangzhou)
Inventors: CHIH-LI LIU (Taipei), JEN-MIN HUANG (Taipei)
Application Number: 14/022,404
International Classification: B32B 37/00 (20060101);